# Tutorial: http://www.cmake.org/cmake/help/cmake_tutorial.html

cmake_minimum_required(VERSION 2.6)
project(concordia C CXX)

set (CONCORDIA_VERSION_MAJOR 1)
set (CONCORDIA_VERSION_MINOR 0)

# Whether to use stop words
set (STOP_WORDS_ENABLED "false")

include(CheckTypeSize)
# Type of the characters in SA

CHECK_TYPE_SIZE("unsigned int" UINT_SIZE)
message(STATUS "UINT_SIZE: ${UINT_SIZE}")
CHECK_TYPE_SIZE("unsigned long" ULONG_SIZE)
message(STATUS "ULONG_SIZE: ${ULONG_SIZE}")
CHECK_TYPE_SIZE("unsigned long long" ULLONG_SIZE)
message(STATUS "ULLONG_SIZE: ${ULLONG_SIZE}")

if (UINT_SIZE EQUAL 4 AND ULONG_SIZE EQUAL 8)
    set (INDEX_CHARACTER_TYPE "unsigned int")
    set (INDEX_CHARACTER_TYPE_MAX_VALUE "UINT_MAX")

    # Suffix markers
    set (SUFFIX_MARKER_TYPE "unsigned long")
    set (SUFFIX_MARKER_TYPE_MAX_VALUE "ULONG_MAX")
elseif(ULONG_SIZE EQUAL 4 AND ULLONG_SIZE EQUAL 8)
    set (INDEX_CHARACTER_TYPE "unsigned long")
    set (INDEX_CHARACTER_TYPE_MAX_VALUE "ULONG_MAX")

    # Suffix markers
    set (SUFFIX_MARKER_TYPE "unsigned long long")
    set (SUFFIX_MARKER_TYPE_MAX_VALUE "ULLONG_MAX")
else()
    message(FATAL_ERROR "Can not find proper C++ types. Try installing in 64-bit architecture")

endif()

set (SUFFIX_MARKER_SENTENCE_BYTES 2)

# The above allows for (roughly) 2^32 = 4 294 967 295 words in corpus.
# It assigns 4 bytes to sentence id and 2 bytes each for suffix offset and sentence length.
# This allows to store 2^32=4 294 967 296 sentences no longer than 65536 words.
# After changing these values be sure to adjust tests (as well as the above calculations).
# Also, you might want to run TooLongHashTest from test_hash_generator.cpp

# =============================== #
# Production paths
# ============================== #

set (PROD_RESOURCES_DIRECTORY "${concordia_SOURCE_DIR}/prod/resources")

# ============================== #
# Testing paths
# ============================== #

set (TEST_RESOURCES_DIRECTORY "${concordia_SOURCE_DIR}/tests/resources")

file(MAKE_DIRECTORY ${TEST_RESOURCES_DIRECTORY}/temp)
file(MAKE_DIRECTORY ${PROD_RESOURCES_DIRECTORY}/temp)

SET(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")

set(BASE_TARGETS concordia)



# ================================================
# Third-party libraries
# ================================================

# ----------------------------------------------------
# Regular expression libraries
# ----------------------------------------------------
option(WITH_RE2 "Using RE2 regular expression library" OFF)
message(STATUS "Using RE2 regular expression library ${WITH_RE2}")

if(WITH_RE2)
    set(HAVE_RE2 1)
endif(WITH_RE2)

option(WITH_PCRE "Using PCRE regular expression library" ON)
message(STATUS "Using PCRE regular expression library ${WITH_PCRE}")

if(WITH_PCRE)
  set(HAVE_PCRE 1)
endif(WITH_PCRE)

# ----------------------------------------------------
# Boost
# ----------------------------------------------------
set(Boost_USE_STATIC_LIBS OFF)
set(Boost_USE_STATIC_RUNTIME OFF)
find_package(Boost COMPONENTS
      serialization unit_test_framework system filesystem program_options iostreams regex locale REQUIRED)

# ----------------------------------------------------
# libconfig
# ----------------------------------------------------
find_library(LIBCONFIG_LIB NAMES config++)
find_path(LIBCONFIG_INCLUDE libconfig.h++)

if(EXISTS ${LIBCONFIG_LIB} AND EXISTS ${LIBCONFIG_INCLUDE})
  message(STATUS "Found Libconfig")
  include_directories(${LIBCONFIG_INCLUDE})
  link_directories(${LIBCONFIG_LIB})
else()
  message(FATAL_ERROR "Libconfig not found")
endif(EXISTS ${LIBCONFIG_LIB} AND EXISTS ${LIBCONFIG_INCLUDE})

# ----------------------------------------------------
# ICU (I feeeeel youuuuu...)
# ----------------------------------------------------
find_library(ICU_LIB NAMES icui18n)
find_path(ICU_INCLUDE unicode)

if(EXISTS ${ICU_LIB} AND EXISTS ${ICU_INCLUDE})
  message(STATUS "Found ICU")
  include_directories(${ICU_INCLUDE})
  link_directories(${ICU_LIB})
else()
  message(FATAL_ERROR "ICU not found")
endif(EXISTS ${ICU_LIB} AND EXISTS ${ICU_INCLUDE})

# ----------------------------------------------------
# Logging
# ----------------------------------------------------
find_library(LOG4CPP_LIB NAMES log4cpp)
find_path(LOG4CPP_INCLUDE log4cpp/Appender.hh)

if(EXISTS ${LOG4CPP_LIB} AND EXISTS ${LOG4CPP_INCLUDE})
  message(STATUS "Found Log4cpp")
  include_directories(${LOG4CPP_INCLUDE})
  link_directories(${LOG4CPP_LIB})
else()
  message(FATAL_ERROR "Log4cpp not found")
endif(EXISTS ${LOG4CPP_LIB} AND EXISTS ${LOG4CPP_INCLUDE})

# ================================================
# Concordia: Configuration
# ================================================

configure_file (
  "${concordia_SOURCE_DIR}/concordia/common/config.hpp.in"
  "${concordia_SOURCE_DIR}/concordia/common/config.hpp"
  )
message(STATUS "Configured common/config.hpp")

configure_file (
  "${concordia_SOURCE_DIR}/tests/resources/concordia-config/concordia.cfg.in"
  "${concordia_SOURCE_DIR}/tests/resources/concordia-config/concordia.cfg"
  )
message(STATUS "Configured tests/.../concordia.cfg")

if (EXISTS "${concordia_SOURCE_DIR}/prod/resources/concordia-config/concordia.cfg.in")
    configure_file (
      "${concordia_SOURCE_DIR}/prod/resources/concordia-config/concordia.cfg.in"
      "${concordia_SOURCE_DIR}/prod/resources/concordia-config/concordia.cfg"
      )
    message(STATUS "Configured prod/.../concordia.cfg")
endif()

# ================================================
# Concordia: sub-projects
# ================================================

set(ALL_DIRECTORIES concordia concordia-console concordia-sentence-tokenizer libdivsufsort utf8 utf8case)

include_directories("${concordia_SOURCE_DIR}")

# In order to include dynamically generated libdivsufsort headers
include_directories("${concordia_SOURCE_DIR}/build/libdivsufsort/include")

foreach(dir ${ALL_DIRECTORIES})
  link_directories("${concordia_BINARY_DIR}/${dir}")
  add_subdirectory(${dir})
endforeach(dir)



# ================================================
# Tests
# ================================================

set(TESTS_TARGETS concordia-tests)

add_subdirectory(tests)

ENABLE_TESTING()
ADD_TEST(FullTest ${CMAKE_CURRENT_BINARY_DIR}/tests/unit-tests/test_runner)

# Doxygen
find_package(Doxygen)
if(DOXYGEN_FOUND)
    FIND_PROGRAM(DOT_TOOL dot DOC "Dot tool from graphviz")
    SET(DOXYFILE_LATEX ON)
    SET(DOXYGEN_HAVE_DOT NO)
    SET(DOXYGEN_QUIET YES)

    SET(INPUT_FILES)
    SET(INPUT_FILES "${INPUT_FILES} ${CMAKE_CURRENT_SOURCE_DIR}")

    if(DOT_TOOL)
        SET(DOXYGEN_HAVE_DOT YES)
        message(STATUS "Graphviz found")
    else(DOT_TOOL)
        message(STATUS "Consider installing Graphviz for call and caller graphs in the documentation")
    endif(DOT_TOOL)
    configure_file(${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile @ONLY)
    add_custom_target(doc ALL ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile
    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
    COMMENT "Generating API documentation with Doxygen" VERBATIM)

endif(DOXYGEN_FOUND)